Claes a



(No Model.)

C. AV. SVBNSSON.

METAL SHEARS.

No. 317,883. Patented May y12. 1885.`

'UNITED STATES PATENT OFFICE.

CLAES A. SVENSSON, OF BUFFALO, ANEW YORK, ASSIGNOR OF ONE-HALF TO l/'flLL-AM I OLIVER, OF SAME PLACE.

SPECIFICATION forming part'vofLettersPatent No. 317,883, dated May 12, 1885. .Application'filod April 1, v1884. (No model.)

To all whom, t may-concern:

Beit known 'that I, CLAES. A. -SVENss0N, a

citizen of Sweden, residingfin the cityof Buffalo, in the county of Erie Yand. State 'of yNew York, have invented new and'useful Improvement-s in Metal-Shears, of which lthefollowing is fa specification.

rIh-is invention relates to an improvement in that class of hand or `bench shears which are used by jewelers for cutting metal, andl which consists, essentially, of a stationary frame or table which carries a fixed blade, and islsecured to the work-bench, "and a movable arm which is pivoted to the stationary frame and provided with a movable blade.

The object of my invent-ion is Ito provide means for adjusting :the angle .or inclination at which the movable blade meets the fixed blade, in order to produce such an adjustment ofthe blades with relation to each other .that the metal will not curl up i-n cutting; and, further, to reduce as much as possible the friction between the parts, whereby the movable arm is actuated, and to provide gages for regulating the form or angle of the cut.

My invention consists, to these ends, lof the improvements in the construction ofthe shears, which will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, Figure l is a sideelevation of my improved shears. Fig. 2 is an end elevation thereof. Fig. Sis a vertical section in line a: x, Fig. 1. Fig. 4 is a longitudinal section in line y y, Fig. 2. Fig. 5 is a cross-section in line z z, Fig. l. Fig. 6 is a top plan view of the shears.

Like letters of reference refer to like parts in the several gures. A

A represents the stationary frame of the machine, provided with a base-plate, a, whereby it is secured to the work-bench.

b is the stationary blade, secured in an upright position to the frame A, and b is a horizontal table or support formed on the frame A in front of the stationary blade b.

C is an upwardly-projecting arm formed on the frame A in rear of the stationary blade b.

D is the movable arm, arranged in front of the iiXed arm C, and provided at its free end with the movable blade d, which is removably secured thereto by screws d in a common manner.

e is the pivot ou which the movable Varm D swings, and which is attached to the 'stationary arm C. The pivot eis formed in one piece with a cylindrical bolt, E, which is seated in a-cylindricalopening-in the arm C, so as to turn therein. The pivot e is arranged eccentrically on the bolt E, as represented in Fig. 5, so that by turning the bolt E in its socket in the arm C the pivot e is raised or lowered on the stationary arm C, thereby'raising or lowering the fulcrum of the arm D and movable blade d, and decreasing or increasing the angle at which the movable blade meets the stationary blade b. In cutting-metal it is desirable that the angle which the movable blade forms with the stationary blade should not be so great as to cause the metal to curl up in cutting, and this angle is readily regulated by raising or lowering the pivot e on the stationary frame. The arm D is held on the pivot e by a screw-nut, e.

The rear end of the bolt E is provided with' a square or polygonal head, e2, so that the bolt can be turned in its socket by applyingasuitable wrench to the bolt. After the boltE has been adjusted it is secured in position by a set- Screw, e3.

f is a pin or projection formed on the bolt E, on the rear side of the stationary arm C; and f f2 are two stop-pins secured to the rear side of the arm C, to limit the turning movement of the bolt E. When the projection f rests against the stop-pinf, as represented in Fig. 5, the pivot e is in its lowest position, and when the bolt E is turned, so that the projection f rests against the stop-pinf2, the pivot e is in its highest position.

G represents the movable handle by which the movable arm D is actuated. This handle is secured to a cylindrical bolt, H, which is seated in a cylindrical socket in the arm C, and provided with a pin, h, arranged eccentrically with reference to the bolt H, and projecting forwardly beyond the arm C through an elongated opening` I, formed in the arm D.

z' represents a roller, of steel, applied to the pin H, and fitting snugly in the elongated opening I. The latter is provided on its un- IOO dersidewithabearing-piece, j, of steel,against which the roller t' bears in moving the arm D downwardly.

Upon turning the bolt H by the handle G ihe pin h moves in the are of a circle about the axis of the bolt H and causes, by means of the roller z', an oscillating movement of the arm D. The roller t' is free to turn on the pin H, and greatly reduces the friction between these parts.

The arm D is held to the pin h by means of a screw-nut, 7:.

Z is a set-screw arranged in the arm D above the roller t', forthe purpose of taking up any wear or play which may be created between these parts by long-continued use.

N is a gage arranged in rear of the movable blade D, and adj ustably attached by means of a set-screw, m, to a horizontal bar or rod, N, which is secured to the'rear side of the arm D.

The metal to be cut is placed upon the table b and against the front edge of the gage N, whereby the width or length of the strip cut oft' from the rod or bar at each eut can be regulated. This width can be increased or reduced by adjusting the gage N on the rod N. The bar N is provided with suitable graduations to facilitate the adjustment ofthe gage on the same.

o represents a gage arranged on the table b', and attached thereto by a screw, p, which passes through a curved slot, p', in said gage. The gage o can be adjusted at any desired an gle with reference to the cutti 11g-blades, thereby enabling the metal to be eut at any desired angle.

I claim as my invention- 1. The combination, with the stationary frame A, provided with a stationary blade, I), of an arm, D, provided with a removable blade, d, and pivot e, made vertically adjustable on the stationary frame to regulate the angle ol" the movable blade with reference to the stationary blade, substant-iall y as set forth.

l l i l l l l 2. The combination, with the stationary frame A, provided with the fixed blade b, of an arm, D, having a movable blade, d, and pivote, formed eccentrically on a bolt, E,which is capable of being turned in the stationary frame for raising and lowering the pivot e, substantially as set forth.

3. The combination, with the stationary frame A and fixed blade Z1, of the arm D, provided with a blade, d, bolt E, provided with an eccentrical pivot, e, and projection f, and

stopsff2, scoured to the stationary frame, substantially as set forth.

4.. The combinatiomwith'a stationary frame, A, and fixed blade b, of the pivoted arm D, provided with al blade, d, elongated opening l, formed in the arm D, actuating-pin h, and roller fi, mounted on the pin 7L in the opening l, and han d-lever G, substantially as set forth.

5. The combination, with the stationary frame A and fixed blade b, of the pivoted arm D, provided with a blade, d, opening I, formed in the arm D, actuating-pin h, roller 1', bearing-piecej, and set-screw l, and hand-lever G, substantially as set forth.

6. The eo1nbination,with astationary frame, A, and fixed blade I), of apivoted arm, D, provided with a blade, d, horizontal rod N', secured to the arm D, and gage N, adjustably secured to the rod N', substantially as set forth.

7. The combination, with the stationary frame A, provided with a txed blade, b, and table b, of a gage, o, adj ustably secured on tl e table b in front of the tixed blade I), and a pivoted arm, D, provided with a blade, d, substantially as set forth.

fitness my hand this 28th day of March, lSSl.

(lLAllS A.. SVENSSON.

\Vitnesses:

JNO. J. Bonnie, CARL F. GEYER. 

